Bombing of Valnerina

The Bombing of Valnerina (1503) was a battle of the Italian War of 1499-1504 that occurred when the assassin Ezio Auditore da Firenze used a prototype bomber to destroy several Borgia workshops, supply carts, and troop positions in Valnerina, Umbria. The bombing crippled Cesare Borgia's Papal armies, which were now without air support and supplies.

History
In 1503, Cesare Borgia commissioned Leonardo da Vinci to design a prototype bomber aircraft for use in the Papal Army during his campaigns in Romagna and other parts of Italy, and he made plans to mass-produce it. Ezio Auditore da Firenze, the chief rival of the House of Borgia, set out to destroy these war machines before Borgia could use them to conquer all of Italy. Auditore infiltrated the settlement of Valnerina, where the weapons were stored, and he forced the engineer Galdino di Cello to give him the location of the weapons' designs. He burnt down the design plans before making his way to the tower in the other castle, where the flying machine was stored. Ezio climbed the tower and kicked a lever on the roof of the tower, causing a grate to open, and the Borgia guards protecting the flying machine fell through the tower. Auditore then climbed onto one of the machines, and he proceeded to fly it across the countryside and destroy the workshops where new flying machines were being built. He periodically set fires on the ground to keep himself in the air, swooping down to drop bombs on the factories, on wagons carrying salvaged workshop goods, and on a single mounted courier who sought to inform Cesare Borgia about the destruction. Auditore proceeded to crash the bomber into a watchtower, destroying it, and he left Valnerina. Da Vinci's last war machine was destroyed, crippling Borgia's army.